Oxygenation of -nitrophenylhydrazones with Co(II)-schiff base complexes |
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Authors: | A Nishinaga H Tomita M Oda T Matsuura |
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Institution: | Synthetic Chemistry, Faculty of Engineering, Kyoto University, Kyoto, Japan |
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Abstract: | -Nitrophenylhydrazones, unsusceptible to autoxidation, are readily oxygenated in the presence of a five-coordinate cobalt(II)-Schiff base complex, Co(II)(MeOSalen) (Py) leading to quantitative formation of novel 1-(-nitrophenylazo)-1-peroxy Co(III) complexes 2, which were isolated as crystals. A plausible mechanism involving hydrogen abstraction by Co(III)(O2?.) from the substrate followed by formation of a substrate anion Co(III) complex intermediate is proposed. |
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